Feeding mechanism for sewing-machines.



No. 802,098. PATENTED 0OT.1'7,1905. W. G. FREE. FEEDING MECHANISM FORSEWING MACHINES.

3 SHEETS SHEET 1.

Wibzawwu:

No. 802,098. PATENTED OCT. 17, 1905.

W. 0. FREE.

FEEDING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED AUG. 2. 1005.

a SHEBTS-SHEET 2.

Inmu mu m No. 802,098. PATENTED OCT. 1'7, 1905. W. 0. FREE.

FEEDING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED AUG. 2. 1905 3 SH EBTS-SHEBT 3- N Eva/afar- WILLIAM 0.FREE, OF CHICAGO, ILLINOIS.

FEEDING MECHANISM FOR SEWING-MACHINES- Specification of Letters Patent.

Patented Oct. 17, 1905;

Application filed August 2, 1905. Serial No. 272,404.

To all whom, it may concern.-

Be it known that I, WVILLIAM 0. FREE, a citizen of the United States ofAmerica, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in FeedingMechanism for Sewing-Machines,of which the following is a specification.

My invention has for its object the simplification and improvement ofmechanism of the class mentioned above; and it consists of certain newand useful features of construction and combinations of parts especiallydevised to those ends, all as hereinafter fully described, andspecifically pointed out in the claims appended hereto.

Referring to the accompanying drawings, which form a part of thisspecification, Figure 1 is a bottom plan view of a sewing-machineprovided with my improvements. Fig. 2 is a vertical partial section ofthe machine at the dotted line 2 2 in Fig. 1. Fig. 3 is a section at thedotted line 3 3 in Fig. 1 of parts there shown. Fig. 4 is an isometricaldetail of the feeding mechanism of the machine detached from thebase-plate thereof. Fig. 5 is a detail to be referred hereinafter.

Like letters of reference indicate corresponding parts throughout theseveral views.

A is the base-plate of a sewing-machine containing my improvements,having-an upright standard A erected thereon supporting an overhangingarm A and provided with a hanger A and downwardly-projecting lugs AhA",'A, A, A and A", having bearings A A, and A therein for supportingparts to be described hereinafter.

B is a shaft provided with a crank B and mounted in suitable bearings inthe standard A and arm A of the machine, and will be hereinafterreferred to as the main shaft.

C is a driving-shaft mounted in the bearings A A in the lugs A A Thisshaft operates both the shuttle-driving mechanism and the feedingmechanism of the machine.

D is a rock-shaft mounted at each end and parallel to the shaft 0 bymeans of pointscrews D, tapped through the lugs A A.

E is a feedbar having a transverse slot E therein and provided with afeed-dog E, projecting above its upper edge and mounted in the slidewayE formed by the hanger A and lug A on the base-plate A.

E is a crank-arm connecting the rock-shaft D with the feed-bar E, oneend E of such crank-arm E being fast to the rock-shaft D, and the otherend E thereof being connected, by means of a pivot E, with the feed-barE.

F is a rock-shaft-actuating arm arranged parallel to the feed-bar E andhaving a transverse slot F therein.

F is a crank-arm connecting the rock-shaft D with therock-shaft-actuating arm F, one end F of such crank-arm F being fast tothe rock-shaft D and the other end F thereof being connected, by meansof a pivot F, with the rock-shaft-actuating arm F.

G is a feed-regulating lever having a slotted way G therein andpivotally mounted in a fixed bearing A by means of a pintle G G is a nutapplied to the free and correspondingly-threaded end of the lever G forsecuring the same at any desired angle of inclination by turning it downupon the curved edge of the bearing Gr on the base-plate A.

H is a roller or other stud projecting transversely from the free endportion of the arm F into the slotted way Gr in the feed-regulatinglever G and cooperating therewith in the manner and for a purpose to beexplained hereinafter.

I is a crank-wheel having an elongated radial socket I thereon andmounted fast on the driving-shaft C.

I is a pitman pivoted at its upper end to the crank B on the main shaftB and provided at its lower end with a roller-stud 1", projectingtransversely therefrom into the socket I in the crank-wheel I.

I is a link pivotally connecting the pitman I between its ends and at Ito a pivot-bearing I on the standard A of the machineframe. i

J is a triangular curved feed-bar eccentric mounted fast on thedriving-shaft O and in the transverse slot E in the feedbar E.

J is atriangular curved rock-shaft-actuating arm-eccentric mounted faston the driving-shaft C and in the transverse slot F in therock-shaft-actuating arm F.

The function of the eccentric J is to move the feed-bar E, with itsfeed-dog E, alternately upward and downward at predetermined times. Thefunction of the eccentric J, cooperating with the way G in thefeedregulating lever G, is to move the rock-shaftactuating arm Falternately and longitudinally inward and outward at predeterminedtimes, thereby communicating, through the crank-arm F, rock-shaft D, andcrank-shaft E, corresponding inward and outward movements of thefeed-bar E.

The eccentrics J J are so arranged on the driving-shaft C that theirconsecutive operations will be as follows: The former, J, will move thefeed-bar E upward. The latter, J, acting in conjunction with the slottedfeed-regulating lever G and through the parts F, F, I), and E will moveit inward. The former, J, will move it downward, and the latter, J,acting in conjunction with the slotted feedregulating lever G andthrough the parts F, F, D, and E will move it outward to itsstarting-point.

K is a disk secured transversely to the lefthand. end of thedriving-shaft C and serves, in connection with the outer end of thebearing A on the base-plate A, as a means of maintaining the feed-bar Ein accurate engagement with the periphery of the eccentric J.

When the feed-regulatinglever G is in the position shown in Fig. 3 andthe eccentric J is rotated, the joint operation of the slotted way Gtherein and of such eccentric will be to produce the maximum length oflongitudinal reciprocations of the rock-shaft-actuating arm F and actingthrough the rock-shaft D of the feed-bar E. In proportion as the lever Gis made to approach a horizontal position the longitudinalreciprocations of the rock-shaft-actuating arm F and feed-bar E will beminimized in length.

The remaining unlettered parts (shown in Fig. l of the drawings) belongto the shuttledriving mechanism of the machine and are fully shown,described, and claimed in Letters Patent of the United States, No.692,843, issued to myself February 11, 1902. Said unlettered parts neednot be regarded in order to fully understand the invention hereindescribed and claimed.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In feeding mechanism for sewing-machines, in combination, a feed-barand a rockshaft-actuating arm arranged parallel to each other and havingtransverse opposite slots therein, a driving-shaft extending through theslots in such bar and arm, a rock-shaft parallel to the driving-shaft,crank-arms connecting the rock-shaft with the feed-bar androckshaft-actuating arm, a pivoted feed-regulat ing lever having aslotted way therein, a stud projecting transversely from the free endportion of the rock-shaft-actuating arm into the way in thefeed-regulating lever, atriangular curved feed-bar eccentric-mounted onthe driving-shaft and in the slot in the feed-bar, a triangular curvedrock-shaft-actuating arm-eccentric mounted on the driving-shaft in theslot in the rock-shaft-actuating arm, the eccentrics and Way in thefeed-regulating lever being so located and arranged that their joint andconsecutive operations will move the feedbar successively upward,inward, downward and outward, substantially as and for the purposespecified.

2. In feeding mechanism for sewing-machines, in combination, a feed-barand a rockshaft-actuating arm arranged parallel to each other and havingtransverse opposite slots therein, a driving-shaft extending through theslots in such bar and arm, a rock-shaft parallel to the driving-shaft,crank-arms connecting the rock-shaft with the feed-bar androcksh'aft-actuating arm, a pivoted feed-regulating lever having aslotted way therein, a stud projecting transversely from the free endportion of the rock-sh'aft-actuating arm into the way'in thefeed-regulating lever, a triangular curved feed-bareccen-tric mounted onthe driving-shaft and in the slot in the feed-bar, a triangular curvedrock-shaft-actuating arm-eccentric mounted on the driving-shaft in theslot in the rock-shaft-actuating arm, the slotted way in thefeed-regulating lever being so located and arranged that, acting throughthe stud on the rock-shaft-actuating arm, the

movement of such lever on its pivot will lengthen or shorten thelongitudinally-reciprocating movements of the rock-shaft-actuating armand feed-bar of the machine, substantially as and for the purposespecified.

3. In feeding mechanism for sewing-machines, in combination, a feed-barand a rockshaft-actuatin-g arm arranged parallel to each other andhaving transverse opposite slots therein, a driving-shaft extendingthrough the slots in such bar and arm, a rock-shaft parallel to thedriving-shaft, crank-arms connecting the rock-shaft with the feed-barand rock-shaft-actuating arm, a pivoted feed-reg ulating lever having aslotted way therein, a stud projecting transversely from the free endportion of the rook-shaft-actuating arm into the way in thefeed-regulating lever, a triangular curved feed-ban eccentric mounted onthe driving-shaft and in the slot in the feed-bar, a triangular curvedrock-shaft-actuating arm-eccentric mounted on the driving-shaft in theslot in the rock-shaft-actuating arm, a main shaft parallel to thedriving shaft and provided with a crank, a crank wheel having anelongated radial socket therein and mounted on the driving-shaft, apitman pivoted, at its upper end, to the crank on the main shaft andprovided, at its lower end, witharoller-stud projecting transverselytherefrom into the socket in the crank-wheel, substantially as and forthe purpose specified.

4:. In feeding mechanism for sewing-machines, in combination, a feed-barand a rockshaft-actuating arm arranged parallel to each other and havingtransverse opposite slots therein, a driving-shaft extending through theslots in such bar and arm, a rock-shaft parallel to the driving-shaft,crank-arms connecting the rock-shaft with the feed-bar androck-shaft-actuating arm, a pivoted feed-regulating lever having aslotted way therein, a stud projecting transversely from the free endportion of the rock-shaft-actuating arm into the way in thefeed-regulating lever, a triangular curved feed-bar eccentric mounted onthe driving-shaft and in the slot in the feed-bar, a triangular curvedrock-shaft-actuating armeccentric mounted on the driving-shaft in theslot in therock-shaft-actuating arm, a main shaft parallel to thedriving-shaft and provided with a crank, a crank-wheel having anelongated radial socket therein and mounted on the driving-shaft, apitman pivoted, at its upper end, to the crank on the main shaft andprovided, at its lower end, with a rollerstud projecting transverselytherefrom into the socket in the crank-wheel, and a link pivotallyconnecting the pitman, between its ends, to a pivot-bearing on thestandard of the machine-frame, substantially as and for the purposespecified.

5. In feeding mechanism for sewing-machines, in combination, a feed-barE and a rock-shaft-actuating arm F having transverse opposite slots Eand F therein, a drivingshaft C extending through the slots E and F inthe bar E and arm F, a rock-shaft D, crank-arms E and F connecting therockshaft D with the feed-bar and rock-shaft-actuating arm,respectively, a feed-regulating lever having a way Gr therein andpivotally mounted, on a fixed bearing, by means of a pintle G aroller-stud H projecting transversely from the free end portion of thearm F into the way G in the feed-regulating lever G, a triangular curvedeccentric J mounted on the driving-shaft C and in the slot E in thefeed-bar E, a triangular curved eccentric J mounted on the driving-shaftC and in the slot P in the rock-shaft-actuating arm, and means forrotating the driving-shaft C,

substantially as and for the purpose specified.

In testimony whereof I have signed my name to this specification 1n thepresence of two subscribing witnesses.

WILLIAM 0. FREE.

Witnesses:

L. L. MORRISON, NELLIE E. ENNETT.

